# eventlet/eventlet

Concurrent networking library for Python

Repository: https://github.com/eventlet/eventlet
Canonical: https://ross.abutalabs.com/products/eventlet
Homepage: https://eventlet.readthedocs.io/
Language: Python
License: NOASSERTION
License Family: other
Topics: python, concurrency, network, c10k, greenlet, production-ready
Last push: 2026-08-14T07:50:30+00:00

## Health v2 (maintenance only)
Score: 76/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 97, release rhythm 35, longevity 100
- inputs: {"age_days": 5013, "days_push": 19, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1275, forks 338 (observed 2026-08-28T04:04:12.953926+00:00)

## What it is
Eventlet is a Python concurrent networking library using greenlet-based coroutines and epoll/libevent for scalable non-blocking I/O with a blocking-style API. It is now in maintenance-only mode with planned retirement, and new usage is discouraged in favor of asyncio.

## Use cases
- run blocking-style Python code with non-blocking I/O
- handle thousands of concurrent network connections in Python
- maintain a legacy Python app that depends on eventlet
- migrate an eventlet-based codebase to asyncio
- add cooperative multitasking to existing Python services

## When to choose
- you maintain an existing application already built on eventlet
- you need bug-fix-level stability for a legacy greenlet-based deployment
- you want help migrating from eventlet to asyncio

## When to avoid
- starting a new Python project - use asyncio instead
- you need new features or long-term support
- you want a library aligned with modern CPython async internals

## Facets
- artifact type: library
- maturity: maintenance
- function: concurrency, networking, http-server
- domain: developer-tools, backend, networking
- platform: python, windows
- tags: greenlet, coroutines, asyncio-migration, c10k, non-blocking-io, legacy, linux, macos

## Member repositories
- eventlet/eventlet (main) score 76

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:12.953926+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T05:03:01.241966+00:00, confidence not recorded.
  - readme: https://github.com/eventlet/eventlet (fetched 2026-08-28T04:04:12.953926+00:00, sha 009958d05dc5)
  - registry_pypi: https://pypi.org/pypi/eventlet/json (fetched 2026-08-29T12:14:44.982890+00:00, sha 83c5f822d2cf)
- Data as of 2026-08-30T08:39:29.467469+00:00.